Optimised for minimal weight and maximum warmth, the Sea to Summit Reactor Lightweight Sleeping Bag Liner boosts your sleep system performance without adding unnecessary bulk. Built with advanced Thermolite® Pro fabric, it uses infrared-absorbing ceramic pigments and hollow-core fibres to trap body heat and add up to 4°C of extra warmth. The stretch-knit construction and shaped arm openings allow natural movement through the night, while the ergonomic hood enhances thermal efficiency without feeling restrictive. Treated with HeiQ Fresh odour control, the Reactor Lightweight stays fresher for longer, dries quickly, and helps extend the life of your sleeping bag by reducing wash frequency. Designed for backpacking, cycle touring, and paddle touring, it’s a compact, technical liner for ultralight adventures.

Sea to Summit Reactor Lightweight Sleeping Bag Liner – Key Features

• Thermolite® Pro insulation: Hollow-core fibres and infrared-absorbing pigments enhance warmth with minimal pack size.
• Adds warmth: Increases sleeping bag performance by up to 4°C.
• Stretch comfort: Stretch-knit fabric fits any sleeping bag shape and allows unrestricted movement.
• Technical hood design: Ergonomic hood improves warmth without adding bulk.
• HeiQ Fresh odour control: Helps keep the liner fresh after extended use.
• Sleep system integration: Shoulder snap connectors pair with compatible Sea to Summit sleeping bags.
• Machine washable: Easy care construction reduces wear on your sleeping bag.
• Lower impact materials: Made with certified recycled fibres and bluesign APPROVED materials.

Specifications – Reactor Lightweight Sleeping Bag Liner

• Best Use: Backpacking, Cycle Touring, Paddle Touring
• Type: Thermal Liner
• Material(s): 100% Post-Consumer Recycled Polyester
• Stuff Sack Material: 100% Polyester
• Temperature Boost: Up to +4°C

Available Sizes

• Short
  Weight: 235 g
  Dimensions: 178 x 80 cm
  Packed Size: 10 x 18 x 10 cm
  Fits Up To Height: 170 cm
• Regular
  Weight: 255 g
  Dimensions: 193 x 80 cm
  Packed Size: 10 x 18 x 10 cm
  Fits Up To Height: 185 cm
• Long
  Weight: 270 g
  Dimensions: 206 x 80 cm
  Packed Size: 10 x 18 x 10 cm
  Fits Up To Height: 198 cm

Experience the ultimate in camping comfort with the Sea to Summit Reactor Sleeping Bag Liner - Compact Mummy w/ Drawcord. This liner is designed to add warmth to your sleep system in cool or cold conditions, making it an essential addition to your camping gear. The Reactor liner uses Thermolite® Pro fabric with infra red-absorbing ceramic pigments and Thermolite® EcoMade fibres to take thermal performance to the next level. It's not just about warmth though, the stretch-knit fabric provides optimal comfort and ensures the Reactor fits any sleeping bag. The classic Mummy version even has practical shoulder openings for those who like to stretch out. The Mummy with Drawcord version offers the versatility of walking around camp while still wearing your liner, thanks to its footbox opening. Plus, with HeiQ Fresh odour control technology, your liner will stay fresh even after extended use. And for peace of mind, the Sea to Summit Guarantee is offered for the lifetime of this product.

Sea to Summit Reactor Sleeping Bag Liner - Compact Mummy w/ Drawcord Features:

• Thermal Boost: The Reactor liner provides a thermal boost to retain heat and warmth, extending the performance of your sleeping bag in colder conditions.
• Thermolite® Pro Technology: The liner uses knitted, hollow-core fibres and infrared-absorbing ceramic pigments to reflect your body's heat back for enhanced warmth and comfort.
• Classic Mummy Version: This version has practical openings in the shoulders to allow the user to stretch his or her arms out.
• Drawcord Footbox Version: In this version, the base or shoulder openings can be opened or closed for optimal comfort. They integrate perfectly with the Free-Flow Zip system in select Sea to Summit sleeping bags. Open the base drawcord, and you can hitch the liner up and walk around camp - perfect for bathroom breaks.
• HeiQ Fresh Odour Control Technology: This technology helps keep the liner fresh even after extended use.
• Knitted Fabric: The fabric provides incredible stretch and freedom of movement - Reactor liners work perfectly with sleeping bags of any shape.
• Sea to Summit Guarantee: A guarantee is offered for the lifetime of this product.

The Sea to Summit Lightweight Compression Sack – 5L – Surf Blue is a compact and durable solution for organised pack storage on backpacking and travel adventures. Made from bluesign APPROVED recycled 70D nylon with a PFC-free DWR finish, it offers an excellent strength-to-weight ratio while keeping soft gear neatly compressed. Designed for internal pack organisation, it can reduce contents to roughly one-third of their original volume, helping you maximise valuable pack space.

Sea to Summit Lightweight Compression Sack – 5L – Surf Blue Key Features:

• Efficient compression: Reduces soft items to approximately one-third of their packed size.
• Lightweight durability: Recycled 70D nylon with 2,000mm PU coating for added weather resistance.
• PFC-free DWR finish: Water resistant fabric suitable for internal pack storage.
• Three-strap system: XS and S sizes use three compression straps for weight savings and easy access.
• Flip-top lid: Prevents strap tangling and keeps closure secure.
• White interior coating: Improves visibility when locating gear.
• Base grab handle: Reinforced nylon webbing for easy handling.

Specifications – 5L

• Best Use: Pack Organisation
• Capacity: 5 Litres
• Weight: 68g
• Dimensions: 15.2 x 15.2 x 29.6 cm
• Closure: Drawstring with compression straps
• Waterproof? Water resistant only – seams are not tape sealed

Compact and practical, the 5L Surf Blue Compression Sack is ideal for compressing clothing layers or lightweight insulation inside your pack.

The Sea to Summit Evac Compression Dry Bag UL – 20L provides high-capacity waterproof compression storage for extended backpacking and paddle sports adventures. Built from bluesign APPROVED Ultra-Sil 30D Cordura® nylon with a non-PFAS DWR finish, it protects gear from rain and spray while allowing trapped air to escape through the EVAC fabric base. The reinforced roll-top closure and four-strap compression system enable even, secure packing of larger soft items.

Sea to Summit Evac Compression Dry Bag UL – 20L Key Features:

• Large capacity storage: 20 litres for sleeping bags, insulated jackets or bulkier gear.
• EVAC air-permeable base: Allows compression without purge valves.
• Reliable waterproofing: Roll-top closure with patented Field Repair Buckle.
• Even four-strap compression: Prevents bulging and maximises space efficiency.
• Ultralight yet durable: Ultra-Sil 30D Cordura® nylon construction.
• Sealed seams: Double-stitched and tape-sealed for dependable protection.

Specifications – 20L

• Best Use: Backpacking & Paddle Sports
• Capacity: 20 Litres
• Weight: 110g
• Dimensions: 24.2 x 24.2 x 47.6 cm
• Closure: Hypalon roll-top with compression straps

Offering maximum compression and generous capacity, the 20L Evac Dry Bag is ideal for protecting and compacting larger gear inside your pack.

The Mystery Ranch Metcalf Mens Pack - 75L invites adventurers to experience the ultimate blend of durability and functionality in a high-capacity pack. Designed for those who require both lightweight versatility and robust load-bearing capabilities, this bag is perfect for extended trips into the wild. Its roll-top closure and side zip offer effortless access and adaptability, while the ultralight frame ensures every ounce is used efficiently. With external blaze orange frame tabs and zippered pockets on a detachable lid, this pack facilitates easy organisation and quick access to essentials. Multiple compression straps and innovative attachment points ensure that your gear remains secure, no matter how much you pack. Whether you're navigating rugged terrain or setting up camp, the Mystery Ranch Metcalf Mens Pack is crafted to adapt to your every need, providing a reliable and versatile companion for your outdoor adventures.

Mystery Ranch Metcalf Mens Pack - 75L Features:

• Roll-top closure and one side zip: Offers versatile access options and allows for easy adaptation to varying load sizes.
• Ultralight frame: Minimises weight while maximising the capacity to bear heavy loads, enhancing your trekking efficiency.
• External blaze orange frame tabs: Enables easy attachment of accessories, providing added customisation and functionality.
• Zippered pockets on detachable lid: Ensures quick and secure access to frequently used items, enhancing organisational convenience.
• Multiple compression straps: Keeps your gear firmly in place, maintaining balance and stability throughout your journey.
• Multiple attachment points for lid straps: Allows for secure lid placement regardless of the pack's load, offering flexibility and reliability.
• Side attachment points for lid straps: Useful when using the bag without the lid, ensuring the roll-top closure remains tightly secured.
• Interior blaze orange ribbon loops: Facilitates the attachment of Small and Medium Quick Attach Zoid Bags, enhancing internal organisation.